CN106460701A - Device and method for controlling a fuel injection valve - Google Patents
Device and method for controlling a fuel injection valve Download PDFInfo
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- CN106460701A CN106460701A CN201580025697.0A CN201580025697A CN106460701A CN 106460701 A CN106460701 A CN 106460701A CN 201580025697 A CN201580025697 A CN 201580025697A CN 106460701 A CN106460701 A CN 106460701A
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- Prior art keywords
- fuel injector
- another
- control
- pulse
- measuring unit
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
- F02D41/247—Behaviour for small quantities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention relates to an actuation device for actuating a fuel injector. The actuation device has (a) an output stage for generating an excitation of an electric drive of the injector, said excitation being transmittable to the drive via an actuation line; (b) a measuring unit for measuring a feedback signal which is generated by the drive in response to the excitation and conducted to the measuring unit via the actuation line; and (c) a control and analyzing unit which is coupled to the output stage and the measuring unit. The control and analyzing unit is designed to prompt the output stage to generate a specified test pulse (270). The measuring unit is designed to measure a response pulse (280) which is generated at least by the actuation line in response to the test pulse (270) and to transmit at least one characteristic feature (t_resp1) of the measured response pulse to the control and analyzing unit. The control and analyzing unit is additionally designed to analyze the characteristic feature and to ascertain at least one piece of characteristic information on a measurement channel on the basis of the analysis of the characteristic feature, said measurement channel comprising the measuring unit and the actuation line. The invention further relates to (a) a method for ascertaining characteristic information on the measurement channel, (b) a method for determining the movement behavior of an injector, and (c) an actuation method for actuating an injector.
Description
Technical field
This patent disclosure relates generally to the technical field of supply combustion engine fuel, slightly more particularly to for spraying into fuel oil
The control of the fuel injector of the combustor of internal combustion engine.The invention particularly relates to the measurement of feedback signal, this feedback signal is by being in
The motion of operating fuel injector dynamically produces.For subject matter required for protection, the present invention relates to for controlling spray
The control device of oily device, determine with regard to the Measurement channel in the system with this control device and fuel injector at least one
The method of characterization information.The invention still further relates to determining the method for kinetic characteristic of this fuel injector and controlling for spraying fuel oil
Enter the control method of this fuel injector of combustion chambers of internal combustion engines.
Background technology
Electromagnetic activation part can be run in so-called total travel with little error.For the fuel injector that fuel oil sprays into it is
Example, this operational mode means that oil-fuel injector needle-valve moves in injection process, until maximum displacement or final position, and sprays into
The persistent period change of the electric control by the coil-driving apparatus of electronic of fuel injector for the change of fuel quantity is realized.This persistent period determines
Injection time, injection time determine again being injected into or to be injected into amount of fuel.
The trend tending to less straying quatity while static fuel flow communication amount is still higher increasingly requires with oil spout
Based on the so-called impelling of device runs.Related to this, fuel injector impelling runs and refers to oil-fuel injector needle-valve according to by electric parameter and knot
Predetermined and freely i.e. parabola shaped after the incoming end of the magnetive attraction flight path half way movement of structure parameter, without reaching
Total travel.Different from total travel, fuel injector impelling runs has significantly larger error, this is because related fuel injector here
Electrical error and machine error all substantially have influence on the motor process of oil-fuel injector needle-valve than in whole operation strongly manyly.
The compensation of this fuel injector error is directed to for example in DE3843138A1 and is described based on the fuel injector of coil.?
This, carry out the independent measurement of voltage change process for each fuel injector, and described voltage change process is superimposed upon each fuel injector
Real control process simultaneously depends on the single electric property of each fuel injector and also has mechanical performance.As described in DE3843138A1
Compensate here based on the fact that, the part of coil drive occurs by the feedback kept away not open signal, this feedback signal depends on
In being caused by vortex flow between fuel injector mechanical mechanism (armature and oil-fuel injector needle-valve) and fuel injector magnet loop (coil)
Couple.Therefore, the feedback time dependent process of signal depends on the actual motion characteristic of the oil-fuel injector needle-valve of each fuel injector.
But, when paying close attention to global error (the spraying into characteristic) of fuel injector, feedback signal Acquisition Error also plays role.
Indivedual performances of fuel injector or indivedual kinetic characteristic more should be accurately compensated for, " feedback signal Acquisition Error " tribute to global error
Offer more notable.Therefore, only when " feedback signal Acquisition Error " for each fuel injector also individually known when, just can accomplish to spray
The accurate compensation of oily device error and and then the high accuracy of fuel injector individually control.
Content of the invention
The present invention is based on following task, improves the control accuracy of the fuel injector for fuel oil sprays into combustion chambers of internal combustion engines.
This task will be completed by the theme of independent claims.The advantageous embodiment of the present invention and other details are come
From dependent claims, specification and drawings.Here, the feature described by related to device and details are obviously also related with method
Be suitable for, vice versa, accordingly, with respect to the disclosure, always can replace with reference to these single inventive aspects.
According to the first aspect of the invention, describe a kind of control device of fuel injector, control in for spraying into fuel oil
The combustor of combustion engine.Described control device has：A () is used for producing the final stage of the electric excitation of electric driver of fuel injector,
This electric excitation can be transmitted this electric driver by control line；B () is used for the measuring unit of measurement feedback signal, this feedback letter
Number measuring unit is transferred into as to produce to the response of electric excitation and by this control line by this electric driver；C () controls
Analytic unit processed, it is connected with described final stage and measuring unit.According to the present invention, this control analytic unit is set up for promoting this
Final stage produces predetermined electrical testing pulse.This measuring unit is set up for measurement at least by this control line as to test pulse
At least one identified characteristic feature of tested transponder pulse is simultaneously transferred to this control by electric transponder pulse produced by response
Analytic unit processed.This control analytic unit also set up the characteristic feature transmitted for analyzing transponder pulse and thereby determine that to
A few characterization information with regard to comprising at least Measurement channel of this measuring unit and control line.
Described control device based on the recognition that, by analysis at least answered as to presumptive test pulse by control line
Answer produced transponder pulse it may be determined that independent measurement passage to signal shape change and/or to the signal of telecommunication moving in time
The respective impact moving.Then, can be assumed by this when controlling the real operating fuel injector of oil spout with electric excitation
Measurement channel is revised in an identical manner and is fed back as produced by the response to respective electric excitation by single electric driver
Signal.This information measures to measured unit and is controlled analytic unit analysis in can be used for accurately determining Measurement channel
The impact of the signal skew of feedback signal.Thus, then Measurement channel can be calculated to signal skew by control analytic unit
Impact, and real feedback signal produced by the electric driver of fuel injector can with high accuracy analyzed.This permits again
Permitted to control the follow-up fuel injector electric excitation of analytic unit correction, thus the independently moving characteristic of oil-fuel injector needle-valve at least approximately corresponds to
In the predetermined motor process leading to desired fuel metering.Thus, the accuracy of measurement of fuel injector especially can be sprayed in a small amount of fuel oil
The so-called impelling entering is significantly increased in running.
In the literature, term " Measurement channel " should refer to injection system, be used to test pulse, transmission survey
Examination pulse, test pulse is converted to transponder pulse, transmission transponder pulse, measurement transponder pulse and/or analysis transponder pulse or
Determine all parts of the characteristic feature of transponder pulse.Because Measurement channel therefore has many elements related to device, therefore
It can also be referred to as " measuring loop ".
Say, it is possible to use the response that control device identification described herein is obtained in calibration range in analysis bluntly
(it is then act through suitable program to mend by the error that respective Measurement channel (clear and definite is not by corresponding fuel injector) causes during pulse
Repay).Because described error fuel injector is normal run in analysis feedback signal when also occur, therefore not being subject to of described feedback signal
The analysis of the part of Measurement channel impact can be realized with higher precision.Thus one, the actual motion characteristic of oil-fuel injector needle-valve
Can be determined with very high precision.
Described measuring unit preferably can also be set up and be transmitted to related fuel injector through control line by final stage for measurement
Electric excitation.In addition, described control analytic unit can according to the specific implementation of control device also by two in space
Upper and/or functionally separated unit realizing.
According to one embodiment of present invention, this control analytic unit is set up for the characteristic feature based on this transponder pulse
The current moment that goes out determine the characterization information with regard to Measurement channel.This is possible below offer in real operation, that is, pass through simple
Mode determines test pulse and transition time transponder pulse, occurring between different measuring passage especially being formed
Difference, and by different electric excitation that transmitted by one or more control line and corresponding to different Measurement channel
Between suitably stagger the time to compensate.
It is to be noted that accurately determining very much of this transit time difference can so be obtained, i.e. each transponder pulse multiple
Characteristic feature be collected and control analytic unit analyze the plurality of characteristic feature go out current moment.If computing capability is corresponding
Height, then control analytic unit even can analyze the whole piece change curve of each transponder pulse.
According to another embodiment of the invention, at least one characteristic feature described of tested transponder pulse includes presence
At least one of feature in the change curve of transponder pulse：Reach threshold value, local maximum or bare maximum, locally
Minima or bare minimum, predetermined slope, flex point, zero crossing.This has the advantage that, at least one characteristic feature described is should
Answer the feature of the change curve of pulse, it can be identified by this measuring unit and/or this control analytic unit in a simple manner decoupled.
If characteristic feature is to reach threshold value, whether reaching this threshold value from above or from below may be meaningful.
Corresponding situation is applied to characteristic feature when being zero crossing.
According to another embodiment of the invention, described measuring unit and/or control analytic unit set up for response
Pulse relatively executes filtered analog signal, signal scanning and/or signal processing.In this way, transponder pulse can be by
Accurate measurement and characteristic feature can reliably be identified very much.Thus, it is possible to avoid or at least reduce or error identification goes out simultaneously
Non-existent characteristic feature or error ground does not identify the error identification of existing characteristic feature.Especially can be by
What the operation (filter, scanning, process) of this described transponder pulse signal extremely accurately to determine characteristic feature goes out current moment.
According to another embodiment of the invention, characteristic feature occurs in voltage measurements and/or current measurement result
In.
If only measured in the case that two measurement parameters are one in voltage and current, preferably measured by measuring unit
It is added in the voltage on the control line of related fuel injector.Whereby it is particularly possible to compared to the known method for determining close moment
Improve precision when determining the close moment of related fuel injector.If the multiple signs being measured transponder pulse by measuring unit are special
Levy, here, at least one characteristic feature occurs in voltage measurements and at least another characteristic feature occurs in electric current survey
In amount result, then measurement of correlation passage can be by such accurate Characterization, that is, in the spy being mutually considered as in fuel injector actual motion
The determination precision of fuel injector close moment can not only be improved when levying, also can determine that the unlatching of related fuel injector is special with higher precision
Property.
According to another embodiment of the invention, this test pulse have less than 500 s, especially less than 200 s and best
Persistent period less than 100 s.
In order to eliminate or at least mitigate when described Measurement channel characteristic describes undesirable by being in effective operation
Impact caused by fuel injector, the electrical testing being associated with test pulse that fuel injector drives is encouraged and weak should not resulted in fuel injector to it
Needle-valve moves.Say, by having the test pulse of very short duration, the characteristic of Measurement channel described herein is retouched bluntly
State, measure or calibrate the impact of the undesirable startup being advantageously not affected by related fuel injector.Thus, the startup of fuel injector
Refer to control by the fuel injector of electric excitation, this electric excitation at least results in the very important movement of oil-fuel injector needle-valve.According to this
Invention, such start fuel injector in the case of, only should correspond to the transponder pulse of Measurement channel in the way of unfavorable and source
The dynamic feedback Signal averaging of the fuel injector of self-starting.
According to another embodiment of the invention, this test pulse leads to the electrical testing of fuel injector to encourage, and it is less than 50mJ,
Especially less than 20mJ, more preferably less than 10mJ.
As described above, the little of this fuel injector has advantages below to the electrical testing excitation that related fuel injector is not activated,
The analysis of at least one characteristic feature of this transponder pulse leads to the characterization information thus obtained to relate only to described Measurement channel,
Dynamic without regard to fuel injector that be activated or powered.
According to another embodiment of the invention, this control device is set up for controlling for fuel oil is sprayed into internal combustion engine
Another fuel injector of another combustor.Also included according to the control device of embodiment described herein：A () is used for producing another spray
Another final stage of another electric excitation of another electric driver of oily device, described another electric excitation can quilt by another control line
It is transferred to this electric driver, (b) is used for measuring another measuring unit of another feedback signal, and described another feedback signal is by institute
State another electric driver as the response of another electric excitation is generated by described another control line be transmitted to described
Another measuring unit.Now, this control analytic unit is connected with described another final stage and another measuring unit, and this control divides
Analysis unit is also set up for promoting described another final stage to produce predetermined another electrical testing pulse.In addition, described another measurement is single
Unit sets up at least should as electricity another produced by the response to another test pulse by described another control line for (i) measurement
Answer pulse, it is single that at least another characteristic feature being identified of tested another transponder pulse is transferred to this control analysis by (ii)
Unit.In addition, this control analytic unit set up another characteristic feature transmitted for analyzing described another transponder pulse and by
This determines at least another sign letter with regard to another Measurement channel comprising at least described another measuring unit and another control line
Breath.
Described test pulse and another test pulse can have identical signal shape.
By the control device described by embodiment whereby, approximately can measure simultaneously be associated with different fuel injectors not
Same Measurement channel.This advantageously results in can be by suitably considering with regard to the difference for a multi-cylinder engine further
The characterization information of Measurement channel extremely accurately to determine that the motion of the different fuel injectors in the real running of internal combustion engine is special
Property.Related to this, term " kinetic characteristic " especially may refer to the closing performance of related fuel injector.Perhaps can be in kinetic characteristic
Not only determine the closing property of related fuel injector in the range of determination, also determine its opening feature.For this reason, this area skill can be adopted
The method for high accuracy analysis respective feedback signal known to art personnel.
It is noted that aforesaid final stage and another final stage described herein also can by have multiple output stages altogether
Realize with final stage.According to corresponding manner, described measuring unit and another measuring unit can also input by having multiple measurements
Hold and be configured to transfer to the measurement result of different transponder pulses and control a common measuring unit of analytic unit to realize.
It is noted that fuel injector can be electrically excited by a common control line.There are at least four combustor
Internal combustion engine in the case of, preferably two fuel injector correspond to a common control line, these fuel injectors in control time order
Try one's best on time far spaced.Four cylinders in order 1,2,3 and 4 startup first, second, third or the 4th fuel injector
Under engine conditions, fuel injector 1 and 3 preferably passes through a common control line respectively with fuel injector 2 and 4 and accepts corresponding electric excitation.
Can stop in this way for different fuel injectors electric excitation and especially accordingly feedback signal overlapping in time.
Identical situation is obviously also applied for the various different test pulse of two fuel injectors being associated with partnering.This is especially
It is applied to following corresponding transponder pulse, described transponder pulse typically can only be when they are underlapped in time by very accurate
Ground measurement.
According to another embodiment of the invention, this control analytic unit is set up for determining in (a) very first time and (b)
Transit time difference between second time, the described very first time be characterized in test pulse send and transponder pulse receive between the
One time difference, second time difference between another test pulse sends and another transponder pulse receives for described second time representation.
In fact, in different Measurement channel propagate and/or by the measurement analysis operation in respective Measurement channel
The transition time of caused signal is the important characterization information with regard to measurement of correlation passage.In order to mutually calibrate different measurements
Passage and subsequently calibration result produced by consideration in the analysis of the variant feedback signal of different fuel injectors, by this enforcement
Transit time difference determined by mode is the most important parameter for accurately realizing very much this calibration in a simple manner decoupled.
In fact, the reception of corresponding transponder pulse can go out current moment by the characteristic feature of respective transponder pulse
Determine.The type of characteristic feature used can be depending on the expected signal shape of current application and/or especially transponder pulse.
As described above, various types of characteristic feature can be adopted.
According to another aspect of the present invention, describe a kind of for determining with regard to having control device and fuel injector
The method of at least one characterization information of the Measurement channel in system.Methods described has：A () is by the final stage of this control device
Produce predetermined electrical testing pulse；B this test pulse is fed into control line by (), this control line is by this final stage and this fuel injector phase
Connect and be configured to, in the real operation of this fuel injector, from this final stage, the electric excitation being used for starting this fuel injector is sent to this
The electric driver of fuel injector；C () measures by measuring unit and is produced as to the response of this test pulse by this control line
Electric transponder pulse；At least one characteristic feature of the tested transponder pulse of (d) identification；E the characteristic feature being identified is passed by ()
It is defeated by control analytic unit；The transmitted characteristic feature of (f) analysis；G () analysis based on the characteristic feature transmitted is determining
At least one characterization information with regard to Measurement channel.
The understanding of methods described institute foundation is by presumptive test arteries and veins being fed into control line and by analysis as to pre-
Determine transponder pulse produced by the response of test pulse, only can determine by the Measurement channel that cannot avoid completely simple and reliablely
It is short of determined error.This error that cannot avoid completely is in fuel injector really operating independent fuel injector
Cause in the known method individually controlling to feed back the analysis having error of signal, this feedback signal is as to fuel injector electric excitation
Response is producing and to signify or characterize the actual motion characteristic of oil-fuel injector needle-valve.
If the error only being caused by Measurement channel in the real operation of fuel injector is suitable in feedback signal analysis
Take into account, then can extremely accurately determine the actual motion of oil-fuel injector needle-valve in the case of using method described herein
Characteristic.
According to one embodiment of present invention, this fuel injector is associated with this Measurement channel and is attached thereto.In addition, this spray
Oily device is in stationary running conditions, is in fixed position in the oil-fuel injector needle-valve of this stationary running conditions fuel injector.
Say it means that ensure that this oil-fuel injector needle-valve does not move when executing said method bluntly.By this
The mode of kind ensure that the transponder pulse not distortion because of the dynamic of the fuel injector of displacement.But, transponder pulse nevertheless suffers from locating
Impact in the simple electrical characteristic of the driving means of fixed position.But this impact is simple fixed effect, itself and fuel injector
Running status is independently caused by fuel injector and thus can also correspond to the characterization information with regard to Measurement channel.
Described fuel injector this dynamically can make transponder pulse and and then the whole characteristic of Measurement channel describes distortion, this
It is because as it was previously stated, it is armature and oil-fuel injector needle-valve and (d) fuel injector that eddy current effects lead to the mechanical component in (a) activity
Magnet loop or coil between couple.That is, the motion of oil-fuel injector needle-valve leads to motion relatively in known manner
Participate in feedback signal, this feedback signal can be analyzed as follows by suitable known method, that is, this motion is dynamically and especially
It is the closing of fuel injector and/or the time changing curve of unlatching is determined.
Related to this, the simple electrical characteristic of driving means refers to the typical physical characteristic based on its inductivity of coil.
Therefore, according to so-called Lenz's law, the inductivity of coil not only postpones to flow through the rising in time of the electric current of coil, also postpones
It reduces in time.In addition, coil also being capable of temporary transient accumulation of energy in the magnetic field being generated by.
According to another embodiment of the invention, this fuel injector and this Measurement channel separate.
Say it means that fuel injector remains powered off bluntly.This for example can be by temporarily by fuel injector and its control line
Separate suitable switching mechanism is realized.
By fuel injector and control line and and then with the measuring loop treating characteristic description separate the electricity drive causing fuel injector
The simple electrical characteristic dynamically unrelated with perhaps existing fuel injector motion as mentioned above of dynamic device is also without influence on measurement
The characteristic description of passage.Thus, Measurement channel can be characterized with extremely high precision.
According to another aspect of the present invention, describe a kind of oil spout determining for fuel oil being sprayed into combustion chambers of internal combustion engines
The method of the kinetic characteristic of device.Methods described has：A () determines at least one with regard to having control device by preceding method
Characterization information with the Measurement channel in the system of fuel injector；B (), in the case of characterization information determined by considering, analysis responds
In produced by the electric excitation of this fuel injector and the feedback signal that measured by this measuring unit；(c) analysis based on feedback signal
Result is determining the kinetic characteristic of this fuel injector.
Methods described for determining fuel injector kinetic characteristic is based on the following recognition, by preceding method identified only by
The error caused by Measurement channel shortcoming that cannot avoid completely can be considered to carry out in feedback signal analysis or therefrom calculate
Go out.Whereby, the kinetic characteristic of fuel injector can be determined with the precision higher than known method.
According to another aspect of the present invention, describe a kind of oil spout controlling for fuel oil being sprayed into combustion chambers of internal combustion engines
The control method of device.Described control method has：A () supplies electric excitation to this fuel injector, it is interior that this electric excitation leads to fuel oil to spray into
The combustor of combustion engine；B () to determine the actual motion of this fuel injector by the preceding method for determining fuel injector kinetic characteristic
Characteristic.This electric excitation is so designed that, this actual motion characteristic is at least approximately corresponding to the predetermined kinetic characteristic of this fuel injector.
Described control method based on the recognition that, can so improve the oil mass precision of the fuel metering by fuel injector,
I.e. by the reality considering the Accurate Analysis based on aforementioned transponder pulse under the error condition caused by the shortcoming of Measurement channel
The Accurate Analysis of border kinetic characteristic, are so designed that or size sets the electric excitation of fuel injector, and this actual motion characteristic is at least approximate
Corresponding to predetermined kinetic characteristic.This predetermined kinetic characteristic now for example can be attempted so determining by suitable in advance, i.e.
Desired amount of fuel is injected into combustion chambers of internal combustion engines.
It is to be noted that relatively describe multiple embodiments of the present invention from different subject matters.Especially
It is that some embodiments of the present invention to describe together with device claim, and other embodiments of the present invention are together with side
Method claim is describing.But, those skilled in the art understand in the case of reading the application at once, except belonging to a species
It is also possible to realize belonging to any group of the feature of different types of subject matter outside the combination of the feature of invention main body of type
Close, unless expressly stated otherwise,.
Brief description
The other advantages and features of the present invention have been obtained from the following exemplary illustration to current preferred mode.This
Some figures of the accompanying drawing of application are considered only as schematically, rather than according to correct proportions.
Fig. 1 illustrates a kind of system, its have (a) control device according to an embodiment of the invention and (b) respectively by
The final stage of control device supplies multiple fuel injectors of electric excitation；
Fig. 2 illustrates corresponding to a test pulse of different Measurement channel and the exemplary signal curve of two transponder pulses.
Specific embodiment
It is noted that embodiment disclosed below only represents the limited choosing of the possible embodiment variant of the many of the present invention
Select.
Fig. 1 illustrates the control device 100 for controlling totally four fuel injectors, and it is integrated into for fuel oil is sprayed into internal combustion
In system in totally four unshowned cylinders of machine or combustor.For this reason, can be by known way respectively by the combustion of scheduled volume
Oil sprays into respective combustor.Here is it is to be noted, that the present invention is expressly not limited to apply in four-cylinder internal combustion engine.On the contrary, originally
Invention described in literary composition can be used for any internal combustion engine, and this internal combustion engine has a cylinder, two cylinders, three cylinders or such as six
Cylinder or eight cylinders.
Control device 100 includes final stage 110, and this final stage is made up of the final stage unit that multiple unused labellings indicate.According to
This shown embodiment, these final stage units are combined into a common final stage 110.But they or can also be separated
Unit.
Respectively there is a final stage unit to correspond to and be respectively provided with one of four fuel injectors 150 of electric driver 152.Electric drive
Device is schematically illustrated with its coil 152 in FIG.Four units of final stage 110 or final stage 110 set up for as point
Electric excitation is passed through four control lines by the other response to the trigger being transferred to respective final stage unit by control analytic unit 140
One of 115 are transferred to respective electric driver 152.In response to this electric excitation ground, respective fuel injector 150 is in known manner
By of short duration unlatching, thus the fuel oil of scheduled volume is injected into respective combustor.
According to embodiment shown here, this four final stage units are so set up, and as needed, replace conventional electric excitation
The test pulse more small than electric excitation can also be sent to respective electric driver 152 by ground.Equally by control analytic unit
The weak oil-fuel injector needle-valve motion not resulting in related fuel injector 150 to it of 140 test pulses causing.Single by a measurement respectively
Unit 130, respective test pulse also can be detected with regard to its time of occurrence with perhaps for its shape and intensity.But it to be to be pointed out
Be the collection of described test pulse be optional for invention as herein described.
In FIG, show that the different part of function is final stage 110 and measuring unit 130 as separated part.
It is noted that these parts can also specifically be realized with individually unit form.But these parts are common preferably by one
Electric component is realized, here it is particularly possible to be integrated at least one of which measuring mechanism in this final stage.
As it was previously stated, respective control line 115 is at least as response generation one transponder pulse to test pulse, transponder pulse
Gathered by respective measuring unit 130 according to the present invention.It is single that at least one characteristic feature of transponder pulse is transferred to control analysis
Unit 140, it determines the characterization information with regard to respective Measurement channel by the time of occurrence of characteristic feature.Such Measurement channel is extremely
Comprise respective measuring unit 130 and respective control line 115 less.In addition, this Measurement channel also can also comprise final stage 110
Each coil of outfan and respective electric driver 152.
According to embodiment shown here, this characterization information be the characteristic feature of transponder pulse go out current moment.
This characteristic feature can be any feature of signal shape.For example reach threshold value, local maximum or absolute value, office
The moment of portion's minima or bare minimum, predetermined slope, flex point and/or zero crossing is suitable as characteristic feature.Such table
That levies that feature is preferably used to allow respective transponder pulse occurs in temporal precise classification.
By the characterization information with regard to Measurement channel, can accurately determine the electrical characteristic of this Measurement channel.Thus notable
Reduce the error necessarily corresponding to each Measurement channel in principle.Accurately know that the electrical characteristic of Measurement channel allows in fuel injector
150 acceptance leads to accurately determine a feedback signal, this feedback signal in the real operation of electric excitation that each fuel injector 150 is opened
Characterize the motion of the oil-fuel injector needle-valve of each fuel injector 150.Thus, the kinetic characteristic of each fuel injector can be to carry compared to known method
High precision is determined.
It is noted that two fuel injectors 150 also can be controlled by a common control line 115 in known manner.In
It is that this two fuel injectors 150 are associated with a common control line 115, described fuel injector is provided for following injection processes, described spray
Oily process spaced duration in the normal operation of internal combustion engine is more than one of two fuel injectors 150 and another fuel injector 150
Injection process twice.In this way, it is associated with the electric excitation of different fuel injectors 150 and be associated with different measuring passage
Test pulse and transponder pulse all do not affect.
Briefly and simultaneously say bluntly, by the embodiment described herein of the present invention, so reduce Measurement channel
Error, that is, this Measurement channel loaded with predetermined test pulse.Suitable test pulse should have the letter as far as possible accurately limiting
Number curve.
Two kinds of exemplary feature statement and and then the subtracting of Measurement channel electrical error being applied to Measurement channel close to approach
Little, they depend on type or the equipment scale of respective Measurement channel：
(A) if this Measurement channel is made up of at least dry part of control device 100 and each fuel injector 150.In the case, this survey
Examination pulse should be so designed that, does not have mechanical part to move in this fuel injector, and sensing, vortex flow or magnetic are for example passed through in described motion
Change leads to signal intensity, tight and injector characteristics will reflect in the measurement of transponder pulse.In other words, the electricity of fuel injector
Gas characteristic especially should not be because of needle valve movement or temporarily in the magnetic field of the coil of each automatic drive device 152 of fuel injector 150
Put aside energy and have influence on or only slightly have influence on as far as possible the measurement of transponder pulse.Thus, test pulse and each Measurement channel
Or the relevant components part of measurement circuitry all must be so designed that, the electrical characteristics of fuel injector 150 have in the end of each control line 115
There is negligible impact.
(B) Measurement channel or measurement circuitry are only made up of control device 100 and respective control line 115.In other words, control
Device 100 so connects up, and does not control fuel injector in Measurement channel to be detected.Therefore, fuel injector is in Measurement channel characteristic
Impact in description is eliminated.
Test pulse is measured and determined corresponding by suitable algorithm preferably by the signal path of each Measurement channel
The characteristic feature of signal curve or measured value (as extremum (maximum, minima), slope, absolute value).Characteristic feature or true
Compared with theoretical value, difference is stored as adaptive value and is considered for as correction value subsequently measuring fixed measured value.
This could be for the time value (from triggering up to the difference of test pulse characterization value) of different signal paths or Measurement channel
Correction and/or the correction of absolute value (as voltage swing and/or size of current).
In addition, additional algorithm is favourable possibly for the accurate comparability of test pulse and actual electric excitation or control.
If test pulse and actual control or electric excitation except distinct signal intensity be also different in other side, example
As being filtrated to get the different transition time by signal, it makes by the transmission of appropriate algorithm or comparability is necessary
's.
This test pulse is preferably so designed that, i.e. the unlatching (oil spout) of fuel injector does not occur.Oil spout with test pulse
Fuel injection rate curve can so be changed during internal combustion engine operation, higher hazardous emission occurs when fuel oil burns.
Also for this reason, test pulse can be preferably very short (less than 500 s, especially less than 200 s, more preferably less than 100 s),
Or a small amount of energy (less than 50mJ, especially less than 20mJ, more preferably less than 10mJ) is only fallen on fuel injector driving means.
One or more of transponder pulses according to embodiment described herein by electric current and/or voltage signal Lai
Characterize.For voltage measurement, a resistance carries out voltage measurement.For current measurement, also on a resistance, carry out electricity
Pressure measurement.
In order to measure the test pulse for correcting current, can replace testing current pulsedly directly in respective control line
So-called downside on itself measurement line in measurement resistance on add a voltage tester pulse.Here must so constitute itself and survey
Amount line, i.e. the related oil spout being connected by connecting line on described control device does not run into described voltage tester pulse.
Fig. 2 illustrates test pulse together with the corresponding measured value being led to by measurement and the signal analysis of caused transponder pulse
The possible embodiment of (characteristic feature).By the control device with two Measurement channel (passage 1, passage 2), in each survey
Identical test pulse 270 is fallen on amount passage.As shown in the upper portion from Fig. 2, test pulse 270 is at least approximately rectangular
Shape.In addition, test pulse 270 be shown in broken lines trigger relatively started with the t_test that staggers the time.In addition, test
Pulse 270 is had height as used shown in h_test in fig. 2.
By respective measuring unit, measure a transponder pulse 280 or 282 for each Measurement channel.Lower section as Fig. 2
Shown, transponder pulse 280,282 has open and flat or mellow and full edge compared to test pulse 270.In addition, transponder pulse 280
Measured signal so be different from (another) transponder pulse 282 measured signal, i.e. the trigger phase with transponder pulse 280
Close ground to occur with t_resp1 time delay more shorter than transponder pulse 282 (t_resp2 time delay).In addition, transponder pulse
280 signal height h_resp1 is less than signal height h_resp2 of transponder pulse 282.
Say, in trigger until the time period between the threshold value of the respective answer signal of appearance is different bluntly.Cause
This, these different time periods or transition time must be considered for accurately obtaining actual fuel injection event and passing through suitable method
It is compensated.
For absolute measured value also to response pulse signal acquisition is important in the case of, then can be for example by suitable
Coefficient and/or compensation dosage adjust the collection signal of test pulse for described two Measurement channel.
Method for adjusting single channel measurement, two pass bands or multi-channel measurement as herein described has following excellent
Point, wherein, a passage corresponds respectively to a fuel injector：
1. can with the part error of the filtered analog signal of Compensation Feedback signal, its lead to feed back signal time-shift and
The compensating of related fuel injector leads to the error of the amount of fuel to be batched with injection process in controlling.For this part error
Affecting parameters can be for example the parameter differences of part and temperature drift and transition time drift.
2. the systematic error occurring in respective measuring loop can be compensated, described systematic error is in related parser
In or occur because of scanning.Can meet whereby and run very for the fuel injector with the total error in the range of one digit number s
High control requires.
List of numerals
100 control devices
110 final stages
115 control lines
130 measuring units
140 control analytic units
150 fuel injectors
152 electric drivers/coil
270 test pulses
280 transponder pulses
282 another transponder pulses.
Claims (14)
1. a kind of control device for controlling the fuel injector (150) for fuel oil sprays into combustion chambers of internal combustion engines, this control fills
Put (100) to have：
For producing the final stage (110) of the electric excitation of the electric driver (152) of this fuel injector (150), this electric excitation can pass through
Control line (115) is transmitted to this electric driver (152)；
For the measuring unit (130) of measurement feedback signal, this feedback signal is by this electric driver (152) as to electric excitation
Response be generated by this control line (115) and be transmitted to this measuring unit (130)；With
Control analytic unit (140), it is connected with this final stage (110) and this measuring unit (130)；
Wherein this control analytic unit (140) is set up for promoting this final stage (110) to produce predetermined electrical testing pulse (270)；
Wherein this measuring unit (130) is set up for measurement at least by this control line (115) as to this test pulse (270)
The electric transponder pulse (280) of response generation and at least one the identified characteristic feature by tested transponder pulse (280)
(t_respl) it is transferred to this control analytic unit (140)；
Wherein this control analytic unit (140) also sets up the characteristic feature (t_ being transmitted for analyzing this transponder pulse (280)
) and thereby determine that at least one with regard to the Measurement channel including at least described measuring unit (130) and control line (115) respl
Characterization information.
2. the control device according to aforementioned claim, wherein, this control analytic unit (140) is set up for based on this table
The moment (t_respl) levying feature appearance determines the characterization information with regard to this Measurement channel.
3. the control device according to one of aforementioned claim, wherein, at least the one of tested described transponder pulse (280)
One of feature that individual characteristic feature comprises to be present in the change curve of this transponder pulse (280)：Reach threshold value, local maximum
Or bare maximum, local minimum or bare minimum, predetermined slope, flex point, zero crossing.
4. the control device according to one of aforementioned claim, wherein, this measuring unit (130) and/or this control are analyzed
Unit (140) is set up for relatively being executed at filtered analog signal, signal scanning and/or signal with this transponder pulse (280)
Reason.
5. the control device according to one of aforementioned claim, wherein, this characteristic feature occur in voltage measurements and/
Or in current measurement result.
6. the control device according to one of aforementioned claim, wherein, this test pulse (270) has less than 500 s, outstanding
It is less than the persistent period of 200 s and more preferably less than 100 s.
7. the control device according to one of aforementioned claim, wherein, this test pulse (270) leads to this fuel injector
(150) electrical testing excitation, the excitation of this electrical testing is less than 50mJ, especially less than 20mJ, more preferably less than 10mJ.
8. the control device according to one of aforementioned claim, for controlling another combustion for fuel oil sprays into internal combustion engine
Burn another fuel injector (150) of room, this control device (100) also has：
For producing another final stage (110) of another electric excitation of another electric driver (152) of another fuel injector (150),
This another electric excitation can be transferred to this electric driver (152) by another control line (115)；
For measuring another measuring unit (130) of another feedback signal, this another feedback signal is by this another electric driver
(152) it is transferred to this another measuring unit as this another control line (115) is generated by the response of another electric excitation
(130)；
Wherein this control analytic unit (140) is connected with this another final stage (110) and this another measuring unit (130)；
Wherein this control analytic unit (140) is also set up for promoting this another final stage (110) to produce predetermined another electrical testing
Pulse (270)；
Wherein this another measuring unit (130) is set up for measurement at least by this another control line (115) as to another test
Another electricity transponder pulse (282) of the response generation of pulse (270) is simultaneously at least another by tested another transponder pulse (282)
Individual identified characteristic feature (t_resp2) is transferred to this control analytic unit (140)；
Wherein this control analytic unit (140) also set up for analyze this another electricity transponder pulse (282) transmitted another
Characteristic feature (t_resp2) simultaneously thereby determines that at least another is with regard to including at least this another measuring unit (130) with this is another
The characterization information of another Measurement channel of control line (115).
9. the control device according to previous claim, wherein, this control analytic unit (140) is set up for determining
A the transit time difference between () very first time (t_respl) and (b) the second time (t_resp2), the very first time is characterized in test
The very first time that pulse (270) sends and transponder pulse (280) reception between is poor, and the second time representation is in another test pulse
(270) send the second time difference and another transponder pulse (282) reception between.
10. one kind determines at least one with regard to having control device (100) and the control device especially in accordance with claim 1
(100) method of the characterization information of Measurement channel and in the system of fuel injector (150), the method has：
A () produces predetermined electrical testing pulse (270) by the final stage (110) of this control device (100)；
B this test pulse (270) is fed into control line (115) by (), this control line is by this final stage (110) and this fuel injector
(150) it is connected and be configured to will be used for starting the electric excitation of this fuel injector (150) in the real operation of this fuel injector (150)
It is sent to the electric driver (152) of this fuel injector (150) from this final stage (110)；
C () measures by this control line (115) as the response generation to this test pulse (270) by measuring unit (130)
Electric transponder pulse (280)；
At least one characteristic feature (t_respl) of the tested transponder pulse (280) of (d) identification；
E the characteristic feature being identified (t_respl) is transferred to control analytic unit (140) by ()；
The transmitted characteristic feature (t_respl) of (f) analysis；
G () determines at least one the sign letter with regard to Measurement channel based on the analysis of the characteristic feature (t_respl) transmitted
Breath.
11. methods according to foregoing Claims 10, wherein, this fuel injector (150) is associated with this Measurement channel and therewith
It is connected, and this fuel injector (150) is in stationary running conditions, now the oil-fuel injector needle-valve of this fuel injector (150) is in fixation
Motionless position.
12. methods according to foregoing Claims 10, wherein, this fuel injector (150) and this Measurement channel separate.
A kind of 13. methods of the kinetic characteristic of the fuel injector (150) for determining the combustor for fuel oil being sprayed into internal combustion engine,
The method has：
A () determines at least one with regard to having control device by according to the method for one of foregoing Claims 10 to 12
(100) Measurement channel in the system of the control device (100) and especially in accordance with claim 1 and this fuel injector (150)
Characterization information；
(b) determined by consider in the case of characterization information, analysis in response to this fuel injector (150) electric excitation produced and
The feedback signal being measured by this measuring unit (130)；
C () determines the kinetic characteristic of this fuel injector (150) based on the analysis result of feedback signal.
A kind of 14. control methods of the fuel injector (150) for controlling the combustor for fuel oil being sprayed into internal combustion engine, this control
Method has：
A () supplies electric excitation to this fuel injector (150), this electric excitation leads to fuel oil to spray into the combustor of internal combustion engine；
B () is by the actual motion characteristic determining this fuel injector (150) according to the method for previous claim；
Wherein, this electric excitation is so designed that, that is, this actual motion characteristic is at least approximately corresponding to the predetermined fortune of this fuel injector (150)
Dynamic characteristic.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014209587.5 | 2014-05-20 | ||
| DE102014209587.5A DE102014209587B4 (en) | 2014-05-20 | 2014-05-20 | Characterization of a measurement channel for measuring a feedback signal generated by an operating fuel injector |
| PCT/EP2015/057015 WO2015176858A1 (en) | 2014-05-20 | 2015-03-31 | Device and method for controlling a fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106460701A true CN106460701A (en) | 2017-02-22 |
| CN106460701B CN106460701B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580025697.0A Active CN106460701B (en) | 2014-05-20 | 2015-03-31 | Device and method for controlling fuel injection valve |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10309331B2 (en) |
| KR (1) | KR101836033B1 (en) |
| CN (1) | CN106460701B (en) |
| DE (1) | DE102014209587B4 (en) |
| WO (1) | WO2015176858A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108656741A (en) * | 2018-05-21 | 2018-10-16 | 苏州华兴源创电子科技有限公司 | A kind of ink-jet device for dotting and method using solenoid valve control |
Families Citing this family (4)
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|---|---|---|---|---|
| DE102014209587B4 (en) | 2014-05-20 | 2016-03-31 | Continental Automotive Gmbh | Characterization of a measurement channel for measuring a feedback signal generated by an operating fuel injector |
| DE102017120416A1 (en) * | 2017-09-05 | 2017-12-21 | FEV Europe GmbH | METHOD FOR OPERATING AN INJECTOR |
| US11092101B2 (en) * | 2018-08-22 | 2021-08-17 | Rosemount Aerospace Inc. | Heater in-circuit capacitive measurement |
| US10823101B1 (en) * | 2019-11-05 | 2020-11-03 | GM Global Technology Operations LLC | System and method for learning an injector compensation |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20170007455A (en) | 2017-01-18 |
| CN106460701B (en) | 2019-08-06 |
| KR101836033B1 (en) | 2018-03-07 |
| DE102014209587A1 (en) | 2015-11-26 |
| DE102014209587B4 (en) | 2016-03-31 |
| WO2015176858A1 (en) | 2015-11-26 |
| US10309331B2 (en) | 2019-06-04 |
| US20170089288A1 (en) | 2017-03-30 |
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